This device for SC16IS750 is working for me.
/*
* Copyright (C) 2015 Robert Nelson <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/plugin/;
#include <dt-bindings/board/am335x-bbw-bbb-base.h>
#include <dt-bindings/pinctrl/am33xx.h>
#include <dt-bindings/interrupt-controller/irq.h>
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black",
"ti,beaglebone-green";
/* identification */
part-number = "BB-SPI1-SC16IS750";
version = "00A0";
/* state the resources this cape uses */
exclusive-use =
/* the pin header uses */
"P9.31", /* spi1_sclk, SPI1_SCLK */
"P9.29", /* spi1_d0, SPI1_MISO */
"P9.30", /* spi1_d1, SPI1_MOSI */
"P9.28", /* spi1_cs0, CS0 */
"P8.43", /* irq P8_43 (R13) gpmc_a0.gpio2[8] */
/* the hardware ip uses */
"spi1";
/*
* Helper to show loaded overlays under:
/proc/device-tree/chosen/overlays/
*/
fragment@0 {
target-path="/";
__overlay__ {
chosen {
overlays {
BB-SPI1-SC16IS750-00A0 = __TIMESTAMP__;
};
};
};
};
/*
* Free up the pins used by the cape from the pinmux helpers.
*/
fragment@1 {
target = <&ocp>;
__overlay__ {
P9_28_pinmux { status = "disabled"; }; /* spi1_cs0 */
P9_30_pinmux { status = "disabled"; }; /* spi1_d1 */
P9_29_pinmux { status = "disabled"; }; /* spi1_d0 */
P9_31_pinmux { status = "disabled"; }; /* spi1_sclk */
P8_43_pinmux { status = "disabled"; }; /* irq P8_43 (R13)
gpio2[8] */
};
};
fragment@2 {
target = <&am33xx_pinmux>;
__overlay__ {
bb_sc16is_pins: bb_sc16is_pins {
pinctrl-single,pins = <
AM33XX_PADCONF(AM335X_PIN_LCD_DATA2,
PIN_INPUT_PULLDOWN, MUX_MODE7) /* irq P8_43 lcd_data2.gpio2[8] */
>;
};
bb_spi1_pins: pinmux_bb_spi1_pins {
pinctrl-single,pins = <
AM33XX_PADCONF(AM335X_PIN_MCASP0_ACLKX,
PIN_INPUT_PULLUP, MUX_MODE3) /* P9_31 spi1_sclk.spi1_sclk */
AM33XX_PADCONF(AM335X_PIN_MCASP0_FSX, PIN_INPUT_PULLUP,
MUX_MODE3) /* P9_29 spi1_d0.spi1_d0 */
AM33XX_PADCONF(AM335X_PIN_MCASP0_AXR0,
PIN_OUTPUT_PULLUP, MUX_MODE3) /* P9_30 spi1_d1.spi1_d1 */
AM33XX_PADCONF(AM335X_PIN_MCASP0_AHCLKR,
PIN_OUTPUT_PULLUP, MUX_MODE3) /* P9_28 spi1_cs0.spi1_cs0 */
>;
};
};
};
fragment@3 {
target = <&spi1>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_spi1_pins>;
ti,pio-mode; /* disable dma when used as an overlay, dma gets
stuck at 160 bits... */
sc16is750: sc16is750@0 {
compatible = "nxp,sc16is750";
reg = <0>;
clocks = <&clk20m>;
pinctrl-names = "default";
pinctrl-0 = <&bb_sc16is_pins>;
interrupt-parent = <&gpio2>;
interrupts = <8 2>; /* IRQ_TYPE_EDGE_FALLING */
spi-max-frequency = <4000000>;
gpio-controller;
#gpio-cells = <2>;
clk20m: clk20m {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <14745600>;
};
};
};
};
};
On Wednesday, June 17, 2020 at 11:42:57 PM UTC+10, RobertCNelson wrote:
>
> On Wed, Jun 17, 2020 at 7:12 AM <[email protected] <javascript:>> wrote:
> >
> > Hi All,
> >
> > I am trying to interface NXP SPI to UART chip with Beaglebone black. At
> the moment I amusing SPI 1 and breakout board from Sparkfun (
> https://www.sparkfun.com/products/retired/9981) .
> >
> > I have enabled the driver for SC16IS7xx in the kerne
> >>
> >>
> > # CONFIG_SERIAL_SCCNXP is not set
> > CONFIG_SERIAL_SC16IS7XX_CORE=y
> > CONFIG_SERIAL_SC16IS7XX=y
> > # CONFIG_SERIAL_SC16IS7XX_I2C is not set
> > CONFIG_SERIAL_SC16IS7XX_SPI=y
> > # CONFIG_SERIAL_BCM63XX is not set
> >
> > I don't see any message related to SPI or above driver when kernel
> boot-up.
>
> You also need to disable CONFIG_SERIAL_DEV_CTRL_TTYPORT, as it breaks
> CONFIG_SERIAL_SC16IS7XX
>
>
> https://github.com/RobertCNelson/ti-linux-kernel-dev/commit/c8bf98fd9324e3973d5021eefcfa7a549869a578
>
>
> Regards,
>
> --
> Robert Nelson
> https://rcn-ee.com/
>
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/beagleboard/3f14bc95-5f89-4ce4-ab44-af34ea166005o%40googlegroups.com.
